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Item Metadata only The potential of high copper alloys as alternative materials for post-and-core application(Mahidol University. Mahidol University Library and Knowledge Center, 2004) Usanee Peungpaiboon; Somchai UrapeponPublication Metadata only Properties of experimental copper-aluminiumnickel alloys for dental post-and-core applications(2014-01-01) Apiwat Rittapai; Somchai Urapepon; Julathep Kajornchaiyakul; Choltacha Harniratisai; Mahidol University; National Metal and Materials Technology Center (MTEC)PURPOSE: This study aimed to develop a copper-aluminium-nickel alloy which has properties comparable to that of dental alloys used for dental post and core applications with the reasonable cost. MATERIALS AND METHODS: Sixteen groups of experimental... copper alloys with variants of 3, 6, 9, 12 wt% Al and 0, 2, 4, 6 wt% Ni were prepared and casted. Their properties were tested and evaluated. The data of thermal, physical, and mechanical properties were analyzed using the two-way ANOVA and Tukey's testItem Metadata only Fast Fabrication of Superhydrophobic Copper Alloy Fabricated by Commercial Fiber Laser-1062 nm and Stability of Superhydrophobic Surface(2024-01-01) Haryono M.B.; Lin K.W.Y.; Thant K.K.S.; Subannajui K.; Waritanant T.; Haryono M.B.; Mahidol UniversityWe present a fast, straightforward fabrication method to produce stable superhydrophobic copper alloy surfaces. The technique consists of irradiating copper with a fiber laser and then coating the surface with ethanol. The laser ablation generates... surface morphology on the copper surfaces, such as line and grid patterns. We can modify the wetting properties and surface morphology by changing the step size. We assessed the change of the water contact angle on the raw surface, laser-based texturesPublication Metadata only The influence of copper in dealloyed binary platinum-copper electrocatalysts on methanol electroxidation catalytic activities(2015-01-01) Chatwarin Poochai; Waret Veerasai; Ekasith Somsook; Somsak Dangtip; Mahidol Universityand selective copper dealloying in an acidic medium, and we investigated the effect of the copper content in the samples on the catalytic activities toward methanol electroxidation reaction (MOR). X-ray photo-emission spectroscopy (XPS) and inductively coupled... were zero and one, respectively, implying the formation of metallic Pt and Cu2O, respectively. X-ray diffraction spectroscopy (XRD) confirmed that Cu was inserted into a face-centered cubic Pt structure forming Pt-Cu alloys. Scanning electronPublication Metadata only Composition and transitional temperature range of several nickel-titanium alloy wires in orthodontic treatment(2011-09-23) Rutchadakorn Isarapatanapong; Surachai Dechkunakorn; Niwat Anuwongnukroh; Nattiree Chiranavanit; Julathep Kajorchaiyakul; Anak Khantachawana; Mahidol University; Thailand National Metal and Materials Technology Center; King Mongkuts University of Technology Thonburi. The wires were tested in differential scanning calorimetry to find the transitional temperature range. Results: The compositions were nickel (50.085%-51.605%), titanium (46.675%-48.140%), copper (0.995%-1.155%), aluminum (0.220%-1.325%), chromium (0%-0Publication Metadata only Loading and unloading forces following addition of 5% Cu in nickel-titanium alloy used for orthodontics(2017-01-01) Aphinan Phukaoluan; Surachai Dechkunakorn; Niwat Anuwongnukroh; Anak Khantachawana; Pongpan Kaewtathip; Julathep Kajornchaiyakul; Wassana Wichai; King Mongkut s University of Technology Thonburi; Mahidol University; Thailand National Metal and Materials Technology Centerorthodontic archwire. Nickel (purity 99.9%), Titanium (purity 99.8%), and Copper (purity 99.9%) were used in this study with the atomic weight ratio 46.0 Ni: 49.0 Ti: 5.0 Cu. The elements were melted to form an alloy using an electrolytic arc furnace in argon... gas atmosphere and homogenized at 800°C for 1 hr. The alloys were subsequently sliced into thin plates (1.5mm) by EDM wire cutting machine to obtain the specimens and were cold-rolled with 30% reduction followed by heat treatment in a furnace at 400°CPublication Metadata only Comparison of friction forces between stainless orthodontic steel brackets and TiNi wires in wet and dry conditions(2017-03-01) Aphinan Phukaoluan; Anak Khantachawana; Pongpan Kaewtatip; Surachai Dechkunakorn; Niwat Anuwongnukroh; Peerapong Santiwong; Julathep Kajornchaiyakul; King Mongkut s University of Technology Thonburi; Mahidol University; Thailand National Metal and Materials Technology Centerthe frictional forces between a stainless steel bracket and five different wire alloys under dry and wet (artificial saliva) conditions. TiNi, TiNiCu, TiNiCo, commercial wires A and commercial wires B with equal dimensions of 0.016 × 0.022′′ were tested... roughness testing. Static and kinetic friction forces were measured using a custom-designed apparatus, with a 3-mm stretch of wire alloy at a crosshead speed of 1 mm/min. The static and dynamic frictions in the wet condition tended to decrease more slowlyItem Metadata only Development of Cu-Al-Ni alloy for dental post and core application(Mahidol University. Mahidol University Library and Knowledge Center, 2023) Apiwat Rittapai; Somchai Urapepol; Widchaya Kanchanavasita; Kallaya SuputtamongkolGenerally, the technique used for replacement of the tooth is "posts and cores". Noble and semi-precious dental alloys have numerous excellent properties, but they are expensive and unaffordable for lots of patients. The copper-aluminum-nickel alloy... is a reasonably priced alternative, and theoretically is perceived as corrosion resistant. Therefore, this situation could potentially be a prototype to develop a base-metal alloy for dental post and core application, and generate dentistry that is morePublication Metadata only Effect of direct electric resistance heat treatment on loading/unloading behavior of nickel titanium orthodontic wire(2014-01-27) Surachai Dechkunakorn; Chavarit Sujaritviriyakul; Niwat Anuwongnukroh; Nathaphon Tangit; Mahidol UniversityObjective: The aim of this study was to investigate and compare the loading and unloading characteristics of various nickel-titanium (NiTi) and nickel-titanium-copper (NiTiCu) after direct electric resistance heat treatment method (Bender soarer-X... Sentalloy, Tomy L&H and Ormco NiTiCu had significantly different results (p<0.05) after heat treatments. The factors which could affect the loading and unloading characteristics were the difference in alloy composition and the condition of heat treatment